It has been a while since I last posted a poll here, so I guess it's about time to ask for your participation.

I have previously featured and shared with you some of the best online backup services for Linux, which includes Dropbox, ZumoDrive, ADrive, Ubuntu One, SpiderOak, Wuala, Jungle Disk, and CrashPlan. From that list, which do you think is currently the best online data backup service for Linux?: